Stabilisation and control of widely tunable MG-Y lasers with integrated photodetectors

Wavelength-Routed Switching for 25-Gbit/s Optical Packets Using a Compact Transmitter Integrating a Parallel-Ring-Resonator Tunable Laser and an InGaAlAs EAM

“…Within the TWC, the wavelengths of optical packets are changed on a packet-by-packet basis, thus the lasing wavelength of the tunable laser should be tuned within several nanoseconds. So far, several types of tunable lasers have been demonstrated, including the sampled-grating/super-structure-grating distributed-Braggreflector (SG/SSG DBR) lasers [11], [12], digital supermode (DS) DBR lasers [13], modulated grating Y-branch (MGY) lasers [14], and grating coupler with rear sampled grating reflector (GCSR) lasers [15]. These lasers have a common tuning mechanism based on the free-carrier plasma effect produced by current injection, which changes the refractive indices of the tuning sections.…”

High-resolution wavelength tuning technique for a widely tunable MG-Y lasers

“…A MG-Y laser is a typical monolithic tunable semiconductor laser and has been applied widely in optical communication, spectrum analysis, and optical fiber grating interrogators, etc [5][6][7]. As the core element of the scanning laser interrogator for an optical fiber Bragg grating (FBG) sensor system, it has been used in a wide range of research and a wavelength resolution of about 1 pm and precision of about 2 pm has been achieved [8,9]. However, this performance does not completely satisfy the requirements of high-precision interrogators, and the performance of the MG-Y laser may degrade due to environmental changes, cosmic radiation, etc [10][11][12].…”

Study of cascaded tunable DFB semiconductor laser with wide tuning range and high single mode yield based on equivalent phase shift technique

“…Several types of tunable lasers with large tuning range have been realized, such as distributed Bragg reflector (DBR)-type tunable lasers [1][2][3][4][5][6][7][8] and MEMS based external cavity lasers [9][10][11][12][13][14]. The DBR-type tunable lasers are mainly used in the central office (CO) of the data transmission systems for their good performances, but they are high-cost due to the passive and active integration.…”